Fractional block set



FIG. 1 is a front perspective view of a fractional block set showing my new design;

FIG. 2 is a rear perspective view thereof;

FIG. 3 is a side elevational view thereof, the other side being a mirror image thereof;

FIG. 4 is an elevational view of one end thereof;

FIG. 5 is an elevational view of the other end thereof; and,

FIG. 6 is a bottom plan view thereof. 

The ornamental design for a fractional block set, as shown and described. 